Finite Element Analysis On Strength Reduction Coefficient Of Layered Soil Slope

In this paper,a new model of plane geometry model of layered soil slope is proposed.The model takes the line of the slope foot as the dividing line and divides the slope into the stratum above the slope foot and the stratum below the slope foot.Control the number of areas and lines automatically generated by controllimg the order of key points.The APDL parameterized programming language of VB and ANSYS is used for secondary development to realize automatic modeling,automatic analysis and automatic formation of Word format reports.The file conversion technology of VB is used for data processing.After importing various parameter CSV files,the model of infinite formation number can be established by using ANSYS program,and the reduction analysis of arbitrary formation,single parameter and double parameter can be conducted.Using VB to create GUI interface,users can input up to six strata,six materials slope analysis.The user only needs to input the reduction coefficient of the original material parameter to generate the corresponding reduction material parameter.VB automatically calculates the reduction material parameter and forms the ADPL command stream,which can save a lot of input time compared with the GUI operation of ANSYS or the operation mode of ADPL command stream.VB just calls the batch processing function of ANSYS software,and users can obtain the safety coefficient without operating ANSYS.Therefore,people who do not know ANSYS software can use ANSYS for finite element analysis.By using the procedures of the secondary development of relevant examples and calculating engineering examples,using the program automatically convert DP3 and the safety factor of DP4 standards,with limit equilibrium method(Bishop arc method)for the safety factor of contrast,it is concluded that under the rule of DP4 natural state and saturated state of safety coefficient of deviation is within 3%,The results are in good agreement with those of circular arc method.Therefore,the safety factor under DP4 criterion can be used in the finite element analysis of stratified soil slope using ANSYS.The APDL parameterized programming language of VB.NET and ANSYS can quickly design and apply,which has a certain reference significance for the secondary developers of ANSYS.